含Ti钢S420MC伸长率异常的原因分析  

Cause analysis of abnormal elongation of Ti alloyed steel S420MC

作　　者：陶文哲[1] 刘志勇[1] 陈吉清[1] 黄大伟[1] 徐进桥[1] 郭斌[1] 孔君华[1] 

机构地区：[1]武汉钢铁(集团)公司研究院,湖北武汉430080

出　　处：《钢铁研究》2016年第1期29-31,共3页Research on Iron and Steel

摘　　要：针对某厂生产的某批次含Ti钢S420MC的伸长率偏低(19%)的问题,采用金相显微镜和透射电子显微镜对其组织和析出物进行了观察,对造成此批S420MC钢伸长率偏低的原因进行了分析,认为轧后冷速较慢、卷取温度过高,导致大量的渗碳体沿晶界的连续分布,是造成伸长率偏低的主要原因。Aiming at the problem that the elongation of a batch of Ti alloyed steel S420 MC produced in a hot rolling plant was low（19%）,its micro structure and precipitates were observed using metallurgical microscope and transmission electron microscopy,and the reasons why the elongation of Ti alloyed steel S420 MC was low were analyzed.It was found that the slow cooling rate after rolling and the high coiling temperature brought about the continuous distribution of the cementite along grain boundary,which was the main reason that caused the low elongation.

关 键 词：S420MC钢 伸长率 渗碳体 晶界 

分 类 号：TG142.1[一般工业技术—材料科学与工程]